Hitting the next well during fracturing happens all the time. Predictably doing that on a large scale in granite looks a lot harder.

…Backed by $220 million from the US Department of Energy, the Utah FORGE team’s goal is to develop the techniques and tools needed to create well-to-well flow paths through rocks that are at more than 400°F and then send the heated fluids to the surface to power electric generation. This approach is known as an enhanced geothermal system (EGS).

…A paper recently presented at the SPE Hydraulic Fracturing Technology Conference highlighted the problem. The reservoir modeling firm ResFrac offered examples of what can be done to understand geothermal fracturing systems, but said it is not yet possible to model a well plan for a specific location (SPE 209186).